Question

Mean propotion Between 9 and 25

Answer 1

mean between 2 numbers = a+b/2
9+25/2 = 34/2 = 17

Answer 2

Hey,
Thanks for asking this question.

Let the required mean proportion between 9 and 25 is x.

So according to the definition of mean proportion,

9 : x = x : 25

=> 9/x = x/25
=> x^2 = 25×9
=> x^2 = 225
=> x =
$\sqrt{225}$
=> x = +25 or -25.

But as we know that mean proportion between 9 and 25 can not be a negative number,

●●So mean proportion between 9 and 25 is 15


■■Hope My Answer Helped.